Examples of java.lang.ref.ReferenceQueue

java.lang.ref.ReferenceQueue
Reference queues, to which registered reference objects are appended by the garbage collector after the appropriate reachability changes are detected. @version 1.26, 02/26/09 @author Mark Reinhold @since 1.2

    private void readObject(ObjectInputStream s)
      throws ClassNotFoundException, IOException {
        s.defaultReadObject();
  marks = new MarkVector();
  search = new MarkData(0);
        queue = new ReferenceQueue();
    }

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  private void readObject(java.io.ObjectInputStream s) throws IOException, ClassNotFoundException
  {
    s.defaultReadObject();


    int size = s.readInt();
    queue = new ReferenceQueue();
    directComponentRefs = new IntHashMap((int)(size * 1.25));


    while (--size >= 0)
    {
      int uid = s.readInt();

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  public WeakCache(Cache delegate) {
    this.delegate = delegate;
    this.numberOfHardLinks = 256;
    this.hardLinksToAvoidGarbageCollection = new LinkedList();
    this.queueOfGarbageCollectedEntries = new ReferenceQueue();
  }

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  public SoftCache(Cache delegate) {
    this.delegate = delegate;
    this.numberOfHardLinks = 256;
    this.hardLinksToAvoidGarbageCollection = new LinkedList();
    this.queueOfGarbageCollectedEntries = new ReferenceQueue();
  }

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    }


    final ReferenceQueue refQueue()
    {
        if (_refQueue == null)
            _refQueue = new ReferenceQueue();


        return _refQueue;
    }

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    }
    public static ReferenceManager createCallBackedManager(ReferenceQueue queue) {
        return new ReferenceManager(queue){
            @Override
            public void removeStallEntries() {
                ReferenceQueue queue = getReferenceQueue();
                for(;;) {
                    java.lang.ref.Reference r = queue.poll();
                    if (r==null) break;
                    
                    if (r instanceof Reference) {
                        Reference ref = (Reference) r;
                        Finalizable holder = ref.getHandler();

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        private volatile boolean shouldRun = true; 
        public ThreadedReferenceManager(ReferenceQueue queue) {
            super(queue);
            thread = new Thread() {
                public void run() {
                    ReferenceQueue queue = getReferenceQueue();
                    java.lang.ref.Reference r=null;
                    while (shouldRun) {
                        try {
                            r = queue.remove(1000);
                        }  catch (InterruptedException e) {
                            break;
                        }
                        if (r==null) continue;

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        int cap = p2capacity(initialCapacity);


        table = new Entry[cap];
        threshold = (int)(cap * loadFactor);
        
        queue = new ReferenceQueue();
    }

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   * is activated.
   * In other words, if {@link #newQueue} returns null, {@link #shallExpunge}
   * always returns true (unless you override it too).
   */
  protected ReferenceQueue newQueue() {
    return new ReferenceQueue();
  }

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    /**
     * Initialise this subclass during construction, cloning or deserialization.
     */
    protected void init() {
        queue = new ReferenceQueue();
    }

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